import javax.xml.transform.Source;

public class Test2 {
    public static void main(String[] args) {
        int []arr={1,2,3,4,5,6,7,8,9,10};
        int count=0;
        for(int i=0;i<arr.length;i++){
            if(arr[i]%3==0){
                count++;
            }
        }
        System.out.println(count);
    }
}
